at either end enabling the single cable to carry multiple independent output channels of dimmed power. Each channel or circuit should have its own line, ground, and neutral conductor independent of the other circuits, though in some cases the ground or neutral lines may be shared among circuits. Alternatively, multicircuit cables may terminate in multicircuit (socapex) connectors which may in turn be mated to panel-mount multicircuit connectors on dimming equipment or distribution boxes, other multicircuit cables (to increase length), or break-in/break-out adapters to convert the multicircuit connection to a set of stage pin connections. Equipment cabling The cables integrally connected to lighting instruments (often referred to as pigtails) may use 3-conductor SJOOW or SOOW cable or individual high-temperature wires inside of a fiberglass sleeve. In either case, the cable is often smaller gauge and sized to the current rating of the equipment it services. Adapters Twofers are used to connect two devices to a single source. They may be constructed using individual wires inside of a fiberglass sleeve or 12/3 cable, though the latter type tends to be harder to construct and more prone to failure. In some situations it may be desirable to connect an Edison-equipped device to a stage-pin source, such as when using a household fixture as an on-stage practical. Or it may be desirable to connect a stage pin-equipped device to an Edison source, for testing purposes or applications such as using theatrical equipment for architectural or retail displays. In either case, adapters may be constructed with a female Edison connector and a male stage pin connector or vice versa. Some facilities feature 60 or 100 ampere circuits which have larger versions of the stage pin connector to match the higher current rating. Since it is unusual to require more than 20 amperes on a single circuit with modern lighting equipment, adapters may be made to convert a single 60 or 100 ampere stage pin connection to three to five 20 ampere stage pin connections. However, each downstream connection must be independently protected by a fuse or breaker to avoid exceeding the current rating of downstream cables and connectors. Stage pin versus NEMA 5-15 (Edison) connectors The primary advantage of the stage pin connector over the NEMA 5-15 connector (commonly known as an Edison plug) is its ability to lie flat on a stage lessening the likelihood of being a trip hazard. In addition the stage